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Everything posted by born2dive9702

  1. I am working on a project and need your help Can anyone point me to a comprehensive list of the PhytoChemical FAMLIES i.e. alkaloids, glycosides, polyphenols, and terpenes Thank you Brad
  2. Hello everyone I have bit off a little more than I can chew with a project i am working on. First off it should be known I AM NOT a chemist, far from it, so I am a little out of my league with this project. I am trying to find out what are the names of the CATEGORIES of chemical compounds found in plants, both on the primary and secondary metabolite levels. I am NOT looking for the names of the individual compounds. For example I know on the primary metabolite side, Carbohydrates is one category ( am not looking for all the names of the sugars ie mono, di polysacarides, and their sub catagories nor the starches... ) I believe that sugar alcohols such as (sorbitol, mannitol, xylitol, maltitol, maltitol syrup, lactitol, erythritol, isomalt and hydrogenated starch hydrolysates) falls into another catagory of primary metabolites, I believe also that Organic acids? are also primary??? Then I am also looking for the catagories of the secondary metabolites such as terpenes, ??Flavens?? waxes?? Is there such a thing as a chart that shows these items? Please let me know
  3. Ok if i understand my chemistry correct a hydroxide has a pKa value of 15.7 so that means it can form an "ionic bond"? with anything less than a pH of 15.7 i.e. phosphoric acid = 50/50 tri and di, Phosphate at 2. 148, 50/50 Di and mono @ ph7.199, 50/50 of mono and phosphate at ph 12.35 Now my investigation shows that caffeine is a base and has a pKa value of 14? is this correct? Now from what I have read if you take caffeine and react it with citric acid you get caffeine citrate? is this correct? (when I mean react, i mean put the caffeine in water along with the citric acid then evaporate the water resulting in caffeine citrate) Now here is my question, in a soft drink / carbonated beverage with a pH of say 2.51 would the caffeine be as caffeine, or as caffeine citrate? (my experience is the deprotonization of an acid (ie tri sodium phosphate to di sodium to mono...., )Not with the use of a base. Next question if caffeine can form caffeine citrate, what is preventing caffeine from forming caffeine phosphate??? Please let me know.
  4. The amount of free hydrogen ions? Sorry I am not a chemist nor have taken any chemistry classes. My gut instinct is that it is a total of the sum so the ph would down from 4 to 4 . But again this is my gut instinct and I am no chemist. I am a language instructor.
  5. If I have an acid say phosphoric acid which has a ph of 4, and a citric acid with a ph of 4 will the ph still be 4, (because both are independant) or will the ph go down to say 3 because the sum of the 2 parts are greater than the whole? please let me know Thanks Brad
  6. Hello everyone Quick question, given 1 liter solution of phosphoric acid in water, which has a ph of 2.47, how much TriSodium citrate would be needed to drop the ph from 2.47 to 3.3 TIA Brad
  7. Hello Everyone I am not a chemist nor have much experience in the formulas. I have tried to solve this and I can not get it to work out. I am trying to find the Ph of 8.10581454g of 85% phosphoric acid in 18927.1ml of water. Here is my math Ok can some one please tell me if I did this right I have 8.105807928 grams of 85% Phosphoric acid. Now Phosphoric acid has 97.995287 molecular mass So if i divide 8.105870928 by 97.995287 I get .082716304 moles is this correct? Then since I have 18.9271 L So if I take .082716304 and divide by 18.9271 i get .00437 for the concentrate is this correct? Now when I put this into the ph calculator I am getting 2.47 ph is this correct? Please let me know what the Ph would be on this solution. Thank you Brad
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